Master reset: Microsoft Lumia 640

Learn how to master reset the Microsoft Lumia 640 using the menu or hardware keys.

 

 

 

Master reset from settings menu

A master reset restores the original factory settings and may delete your personal data on the internal storage, such as downloads, ringtones, images, apps, contacts, and Visual Voicemail. It does not delete data stored on the SIM card or SD card.

 

  1. Back up data on the internal memory.
  2. From the Start screen, touch the screen and slide left.
  3. Scroll down to and tap Settings.
  4. Scroll down to and tap about.
  5. Scroll down to and tap reset your phone.
  6. Read the warning about your personal content being erased, then tap yes.
  7. Tap yes again to confirm.

 

Master reset with hardware keys

A master reset restores the original factory settings and may delete your personal data on the internal storage, such as downloads, ringtones, images, apps, contacts, and Visual Voicemail. It does not delete data stored on the SIM card or SD card.

 

If the device menus are frozen or unresponsive, you can master reset using hardware keys.

 

  1. Back up data on the internal memory.
  2. Turn off the phone.
  3. Press and hold the Volume Down key
  4. While holding Volume Down, press the Power key to turn the phone on. Release Power when the phone vibrates but continue to hold Volume Down
  5. When the exclamation mark appears on the display, release Volume Down.
  6. Press the following keys in order. Nothing will change on the screen while entering the sequence of buttons.key.
    • Press the Volume Up key.
    • Press the Volume Down key.
    • Press the Power button.
    • Press the Volume Down key.
  7. The phone will automatically reset.
  8. During the reset, two gears rotate on the display for up to 5 minutes, after which the display goes blank for about 30 seconds.

 

 

Related pages

 

Backup and restore